All,
I suggest upgrading Universal 3.2MP3 (PUP exists) , which includes MP3 client.
You can go straight from 3.2 base to MP3.
cariboujohn, you should install each client manually. If already installed, you can enable automatic update in your policy so users will be prompted to install the MP3 client.
Universal , Consumers Policy, select policy, General section click Edit, Checkbox for Automatic updates"
After PGP re initialization, they should be prompted for update shortly
Hope it helps